It reads like a cheaper scam, right. I think there is something to make it not about them or steam alone, from both the open source and business perspective. But there are TLDs more reputable and relevant to said project than .cloud at least.

P.S. And do they use Anubis? It's like the biggest project I saw using it, and without any paid customization too.

You already have Waydroid - but this strips out a lot of stuff you might need, so Waydroid is probably the way to go anyway

Might be possible, but...

Lepton disables various Android services that are not required to run games possibly breaking compatibility with some applications.

Lepton is not designed for general Android use, instead opting to keep the bare minimum functionality required to launch into games.

...so like Waydroid?

The linked article gives a basic rundown already